According to Diario AS, the 18-year-old midfielder, who was signed from River Plate earlier this summer, is already making waves in training under new boss Xabi Alonso.

Mastantuono was officially presented as a Real Madrid player just days ago in the Spanish capital, where he expressed his excitement about joining one of the biggest clubs in the world. Since then, he has been working hard to settle into life at Valdebebas and prove himself worthy of a spot in Alonso’s plans.

Omo, this one sweet o! Reports now claim that the teenager could get his first taste of competitive action in Tuesday’s La Liga opener against Osasuna. While he may not start, the expectation is that Mastantuono will be given minutes to showcase his ability.

For Los Blancos fans, this is a debut worth watching closely. Mastantuono is highly rated for his vision, technical skill, and creativity in midfield. Many see him as one of Argentina’s brightest prospects, and his move to Madrid was seen as a major coup in the transfer market.

The excitement around him is also fuelled by Real Madrid’s long history of developing young South American talents who later became world-class stars. Omo, if Mastantuono lives up to the hype, the Santiago Bernabéu faithful could be about to witness the beginning of another legendary story.

As per AS:

“The idea is for him to get minutes against Osasuna, even if he doesn’t start.”

With the 2025/26 La Liga campaign set to begin, all eyes will be on whether Xabi Alonso decides to give the new boy his much-anticipated debut.

According to reports, his former manager Arne Slot has openly applauded the 26-year-old’s unique creative skills, describing him as a rare talent.

Omo, This One is Sweet to Hear

Alexander-Arnold made headlines earlier this summer after taking what many consider the biggest gamble of his career— running down his Liverpool contract and making the bold switch to Real Madrid.

The England international is now tipped to play a major role in Xabi Alonso’s squad this season, with his trademark crosses and pinpoint set-piece delivery expected to add a deadly new dimension to Madrid’s attack.

And omo, this week, Slot’s comments just reminded fans why the Santiago Bernabéu is so excited about him.

What Arne Slot Said

Speaking to the media, Slot didn’t hold back his admiration:

“With Trent Alexander-Arnold leaving we have lost a lot of creativity from the back. Trent’s crosses and picking out runners was so special. Florian Wirtz has those qualities but in a different position.”

Allegedly, Slot’s words underline just how much Liverpool will miss the right-back’s vision and attacking contribution.

Why Madrid Fans Should Be Excited

If Trent delivers the same kind of magic he showed at Liverpool, Madridistas could be in for a thrilling season. His link-up play, dead-ball accuracy, and ability to spot runs could give Los Blancos an extra edge in both La Liga and the Champions League.

“Omo, this is going to hot” — because if he clicks with Madrid’s attacking stars, defenders across Europe will have a real problem on their hands.